JP2008239294A - Yarn setting device for winder for thermoplastic fiber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn setting device for a winder for thermoplastic fibers, capable of greatly improving yarn setting performance, without requiring a large facility investment, resulting in a lower cost in setting yarn to the winder for thermoplastic fibers. <P>SOLUTION: The yarn setting device for a winder for thermoplastic fibers is for a winder which winds thermoplastic fibers of a filament size of 33 decitex or less to a bobbin which rotates at a winding speed of 3500 m/min or over. A plurality of filaments are simultaneously sucked by a suction device to be guided by a yarn setting guide composed of a yarn path regulating guide and a direction converting guide provided right below it to be guided to a yarn holding part of the bobbin to be set. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a yarn threading device that is used when a plurality of yarns are simultaneously threaded on a winder by using thermoplastic fibers having a fineness of 33 decitex or less and generally fineness.

  More specifically, when a plurality of yarns are sucked by a suction device and guided to a yarn hooking guide and threading is performed, the tension loss and tension variation are reduced by rubbing between each yarn hooking guide and the yarn, and the yarn hooking property is reduced. The present invention relates to a yarn threading device for a winder.

  In recent years, the number of young people seeking fashion is increasing, and the demand for textile products using thin fabrics such as stockings, down jackets, and inners is increasing. Therefore, the fineness of the yarn used rapidly is progressing in any field.

  Against this background, there has been a demand for the development of an almighty winder that can cope with the fineness of the spinning device for thermoplastic fibers.

  In particular, in the spinning process and the winding process, in general, thread bobbing is performed by threading a bobbin by guiding it to a thread threading guide while sucking a plurality of threads with a thread suction device. At that time, tension (hereinafter referred to as “thread tension”) when threading a plurality of yarns greatly affects the thread threading property. If this threading tension is higher than the appropriate range for the yarn, the influence of threading tension loss due to rubbing between the thread and the guide is large. If the threading tension is lower than the appropriate range, the thread is wound around the drawing roller in the previous process. Each of them has a problem that it leads to thread breakage.

  A conventional threading device of a winder is configured to guide a plurality of yarns to a threading guide while sucking with a suction device, and the threading guide used when threading is configured only by a yarn path regulation guide. What is done is widely known. However, in this yarn threading device, when a plurality of yarns are threaded, the suction tension varies due to the bending difference between the yarn path regulation guide between each yarn and the suction device, and the suction tension increases due to an increase in the scratch resistance. The increased yarn has a lower threading tension when threading, and when the thread is brought into contact with the thread gripping part of the bobbin, the thread cannot be fully gripped, and the thread is taken up by the drawing roller in the previous process, There is concern that it may lead to thread breakage.

  As another approach, a thread guide capable of reciprocating in the thread traverse direction is provided on one side of the thread gripping member so as to sandwich the thread gripping member, and an operation guide for delaying and releasing the thread in conjunction with the thread guide on the other side A device has been proposed that guides the yarn to the gripping portion of the thread gripping member by retracting the operating guide protruding toward the bobbin side when threading and the thread guide moved to the front position of the thread gripping member (Patent Document 1). ).

  However, there is a concern that the success rate of switching will decrease for yarns with delicate threading conditions such as fine yarns with a fineness of 33 dtex or less due to the loss of tension due to the long yarn contact portion between the yarn and the yarn path guide. And difficult to apply. In addition, this mechanism has only a planar direction change of the yarn path, and is suitable for single yarn threading, but for multiple yarn threading that requires a three-dimensional element to change the direction of the yarn path, Not suitable for loss of tension.

  In addition, as a method for improving the threading property by the apparatus, a water emulsion-based oil agent is applied to the melt-spun fiber yarn, entangled by a tangling device using compressed air, and taken up by a godet roller, 3000 m / min. When winding onto the rotating bobbin and threading onto the bobbin as described above, there is a threading method for threading after reducing the pressure of the compressed air supplied to the entangling device to 50% or less of the compressed air pressure supplied during normal winding. It has been proposed (Patent Document 2).

However, although this threading method is expected to be effective for threading a plurality of yarns, this method reduces tension loss when threading delicate yarns such as fine yarns with a fineness of 33 dtex or less. Is not taken into consideration, and further improvement is still necessary. Furthermore, when the apparatus is applied, a large facility modification is required, which is disadvantageous in terms of cost.
JP-A-6-107375 Japanese Patent Laid-Open No. 6-341011

  An object of the present invention is to solve the above-described problems and to provide a yarn threading property in a yarn threading device used when threading a plurality of yarns on a winder using thermoplastic fibers having a yarn fineness of 33 dtex or less. The object is to provide a significantly improved apparatus at a lower cost without requiring a large capital investment. That is, more specifically, the object of the present invention is to provide a suction device in a yarn threading device used when threading a plurality of yarns on a winder with thermoplastic fibers having a yarn fineness of 33 dtex or less. When the yarn is guided to the yarn path guide while sucking the yarn and threading, the variation in suction tension caused by rubbing with the yarn hooking guide can be reduced, and threading failure can be reduced. Accordingly, an object of the present invention is to provide a yarn threading device for a winder that can reduce the generation of yarn waste due to failure, shorten the time for threading work, and improve work efficiency.

In order to solve the above-described problem, the yarn threading device for a winder according to the present invention has the following configuration (1).
(1) A yarn hooking device for a winder that winds thermoplastic fibers having a yarn fineness of 33 dtex or less onto a bobbin rotating at a winding speed of 3500 m / min or more, and simultaneously sucking a plurality of yarns The heat is characterized in that it is guided to the thread gripping part of the bobbin and threaded by a threading guide composed of a thread path regulating guide and a direction changing guide provided directly below the threading path regulating guide. A threading device for a plastic fiber winder.

In addition, in the yarn threading device for a thermoplastic fiber winder according to the present invention, a more specific configuration is preferably the following configuration (2) or (3).
(2) The tension variation between the yarns when the plurality of yarns are threaded while sucking the plurality of yarns with the suction device is 0 to 10% with respect to the average tension value. (1) A yarn threading device for a thermoplastic fiber winder according to (1).
(3) The direction changing guide constituting the yarn hooking guide is composed of a separate roller having a textured or grooved surface, or a ring guide having a grooved surface. A yarn threading device for a thermoplastic fiber winder according to the above (1) or (2).

  According to the present invention, the problems associated with the yarn winding device of the conventional winder, that is, the yarn threading failure that occurs when simultaneously threading a plurality of yarns having a yarn fineness of 33 dtex or less, This can be solved by reducing tension loss and tension variation caused by rubbing between each yarn hooking guide and the yarn.

  Hereinafter, the configuration of the yarn threading device of the thermoplastic fiber winder according to the present invention will be described in more detail.

  The yarn winding device for a thermoplastic fiber winder according to the present invention is a yarn for a winder that winds a thermoplastic fiber having a yarn fineness of 33 dtex or less onto a bobbin that rotates at a wind speed of 3500 m / min or more. A threading device, wherein a plurality of yarns are simultaneously sucked by a suction device and guided to a thread gripping portion of a bobbin by a threading guide composed of a yarn path regulating guide and a direction changing guide provided immediately below the yarn path regulating guide. The present invention is characterized in that it is configured to perform multiplication.

  The thermoplastic fiber in the present invention is not particularly limited as long as it is a fiber made of a polymer having thermoplasticity. For example, polyester, polyamide, polylactic acid, polypropylene, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polypropylene, etc. This is the case. Polyester, polyamide, polylactic acid, and polypropylene are preferable.

  In addition, the thermoplastic fiber may contain various additives. Examples of the additive include a stabilizer such as a manganese compound, a colorant (matting agent) such as titanium oxide, a plasticizer, a flame retardant, a conductivity imparting agent, and a fibrous reinforcing agent. Further, other components may be copolymerized as long as the properties of the polymer are not impaired.

  The suction device in the present invention is a yarn that is spun at a high speed using a constant water pressure or air pressure to guide the thermoplastic fiber yarn to a process such as a drawing roller, a yarn path guide, and a yarn hooking device. As a corresponding device, a so-called suction gun is widely known, and depending on the pressure source used for suction, generally in the textile industry, a water suction gun or an air suction gun It is what is called.

  FIG. 1 is a schematic front view showing an example of a yarn threading device for a thermoplastic fiber winder according to the present invention.

  FIG. 2 is a schematic side view showing an example of a yarn threading device for a thermoplastic fiber winder according to the present invention.

  FIG. 3 is a schematic top view of an example of a yarn threading device for a thermoplastic fiber winder according to the present invention.

  FIG. 4 is a front model schematic view showing an operating state of an example of a yarn threading device of a thermoplastic fiber winder according to the present invention.

  Note that the form of the apparatus is not limited to these, and the present invention can be adopted as long as the apparatus performs threading on the bobbin via the threading guide while sucking the yarn with the suction apparatus.

  Hereinafter, an example of a yarn threading device / yarn threading mechanism of a thermoplastic fiber winder according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the position of the running yarn Y when performing yarn hooking is, for example, a drawing roller 1 that draws and / or pulls while sucking each yarn with a suction device 11 such as a suction gun. After passing through the yarn path guide 3 and the swing fulcrum guide 4 via 2, the traverse guide 5, the roller bale 6 and the side of the spindle 7 and the direction of the thread path regulation guide 8 constituting the lower thread path guide are changed. The threading operation is performed through the guide 9.

  In the threading operation, as shown in the operation state of the threading device in FIG. 4, the yarn is moved from 0 to 40 on the circumference of the rotating bobbin 10 by the interlocking of the yarn path regulating guide 8 and the direction changing guide 9. After moving so as to contact at a contact angle θ of °, the bobbin is horizontally moved to the thread gripping portion of the bobbin to grip the thread onto the bobbin. Thereafter, the yarn Y is promptly guided to the traverse guide 5 (FIGS. 1 and 2) and winding is started.

  At this time, when the traveling yarn Y comes into contact with the yarn path regulation guide 8, contact with the yarn by the yarn path regulation guide 8 and scratching are minimized by using the direction changing guide 9 installed immediately below. It becomes possible. In addition, the direction changing guide 9 installed directly below the yarn path regulating guide 8 is brought into contact with the tension roller as much as possible by causing the separate roller to follow or by reducing the yarn contact surface.

  Further, the angle of the direction changing guide 9 when the yarn hooking device is seen from the schematic top view shown in FIG. 3 can be arbitrarily set in the range of 0 to 90 ° with respect to the front direction. It is preferable to set the angle of each yarn so as to face the direction of the suction device 11.

  In order to reduce the bending with the yarn, the standby position of the suction gun when threading is preferably set to the side closer to the winder and the half of the plurality of yarns in the depth direction of the yarn.

  By adopting such a structure, when threading, the effect of greatly reducing the threading success rate by reducing the tension loss and tension variation of the threading tension caused by the rubbing between each threading guide and the yarn. Is obtained.

  The yarn fineness suitable for the yarn threading device of the thermoplastic fiber winder according to the present invention is 33 dtex or less. In the case of a yarn fineness exceeding 33 dtex, the effect of reducing the tension loss due to the bending of the yarn and the yarn hooking guide can be obtained. There is no clear difference, and it is not particularly necessary to have a double structure of the yarn path regulating guide and the direction changing guide. On the other hand, a fine yarn having a fineness of 33 dtex or less exhibits an effect in threading because the threading condition is delicate.

  The number of yarns that are simultaneously threaded by the yarn threading device of the thermoplastic fiber winder according to the present invention is not particularly limited, but the greater the number of yarns, the more effective the yarn threading operation. Therefore, it is preferably 4 yarns or more, more preferably 8 yarns or more. Generally, 8 to 12 yarns are considered to be the upper limit due to the structure of the winder, but this is not an essential limitation.

  The tension variation when threading a plurality of yarns while sucking a plurality of yarns with the suction device of the yarn winding device of the thermoplastic fiber winder according to the present invention is the average tension value of these yarns. The content is preferably 0 to 10%. In order to realize this state, when the yarn is threaded, the standby position of the suction gun is set to the side before the half of the plurality of yarns with respect to the winding machine and the depth direction of the yarn, and the yarn hooking mechanism is This can be realized by applying a yarn hooking device including a regulation guide and a direction changing guide.

  In the conventional yarn threading device, when simultaneously threading a plurality of yarns, for example, when the direction changing guide 9 shown in FIG. 2 is not provided, the plurality of yarns are passed through the yarn path regulating guide 8. Suction gun (suction device) 11 sucks in. In many cases, the suction position of the suction gun 11 is set to the side surface on the front side (left side in FIG. 2) from the half position of the plurality of yarns with respect to the winder and the depth direction of the yarns. Therefore, there is a difference in the bending angle formed between the yarn and the yarn path regulation guide between the yarns. A yarn with a small bending angle (a yarn close to the front of the suction gun 11 (on the left side in FIG. 2)) has a low tension loss due to abrasion resistance and a small decrease in yarn hooking tension, but a yarn with a large bending angle. (The yarn at the back of the suction gun 11 (on the right side in FIG. 2)) increases the tension loss due to abrasion resistance. In particular, in the case of yarns with a yarn fineness of 33 dtex or less, variations in threading tension are the average tension. Over 10% of the value. For this reason, if the variation in the threading tension of each thread exceeds the average tension value of 10%, the thread having a particularly large bending angle tends to exceed 10%, and the threading tension is greatly deviated in the direction of decreasing the threading tension. When the yarn is hooked, the yarn is easily taken by the drawing roller 2 and breakage of the yarn is likely to occur.

  Therefore, in the present invention, it is more preferable that the above-described variation in yarn thread tension is carried out so that the average tension value is 0 to 7%.

  As a result of various studies by the present inventors, the yarn threading device of the thermoplastic fiber winder according to the present invention is a yarn threading guide composed of a yarn path regulating guide and a direction changing guide. It has been found that the tension loss difference due to the difference can be suppressed to the maximum, and the variation in threading tension of each yarn can be suppressed to 0 to 10% with respect to the average tension value.

  Further, the value (average value) of the thread tension is preferably 0.40 g / cN to 0.70 g / cN, more preferably 0.45 g / cN to 0.55 g, according to various findings of the present inventors. It is preferable to carry out in the range of / cN.

  Here, the thread tension of each yarn is an average value obtained by measuring the tension of the traveling yarn Y in front of the yarn path regulation guide 8 for 30 seconds. Further, the above-described value (average value) of the threading tension is obtained by further averaging the tension values obtained for the respective yarns to be threaded.

  FIG. 5 is a schematic view of a surface with a separate roller (SR) groove showing an example of a direction changing guide constituting the yarn hooking guide. FIG. 6 is a schematic view of a ring guide (RG) grooved surface showing an example of a direction changing guide constituting the yarn hooking guide.

  The shape of the yarn path regulating guide constituting the yarn threading device of the thermoplastic fiber winder according to the present invention is intended to regulate the yarn path of the yarn. In FIG. 1 and FIG. However, the present invention is not limited to this. Further, the surface condition of the yarn path regulating guide is not particularly limited, but it is preferable that the surface condition is applied in order to reduce abrasion with the yarn. In the present invention, “satin” means that the surface roughness is 1S or more, and a case where the surface roughness is less than 1S is defined as a mirror surface and called. In the above, the surface roughness is a value measured according to JIS B 0601 (2001), and is represented by the sum of a mountain height and a valley depth. In the present invention, on the surface of the separate roller, at least in a portion in contact with the yarn, any three points are measured with a length of 1 cm in the running yarn direction, and the average value is used. In general, pear texture is called so because it is rough like the surface of fruit pears, but its control is, for example, matte finish with paper on the finish or metal It can be realized with high precision control by a method of roughing by applying sand (metal sand) or metal ball with compressed air on the surface. Preferably, it is obtained by sandblasting (sand spraying) the metal surface, and it is more preferable to control the surface roughness by the particle size of the sand to be sprayed. As the processing sand, ceramic, metal, glass or the like is used. In the present invention, the processing sand is preferably a metal, more preferably chromium.

  In addition, examples of the material for the yarn path regulation guide include iron, aluminum, and ceramic, but ceramic that is excellent in abrasion resistance is more preferable.

  Although the surface state of the yarn hooking guide constituted by the direction changing guide constituting the yarn hooking device of the thermoplastic fiber winder according to the present invention is not particularly limited, it reduces the abrasion with the yarn. It is preferably a separate roller subjected to processing or grooved processing or a ring guide subjected to grooved processing.

  For example, when the direction changing guide constituting the yarn hooking guide is a separate roller with a satin finish or a grooved surface, the separate roller is driven by the traveling yarn Y when the yarn contacts the separate roller. Rotation, scratch resistance is reduced, and tension loss due to scratching can be reduced. In this way, when the surface of the separate roller subjected to a satin finish is used, the material is not particularly limited, but it is preferable to use a surface roughness of the separate roller of 2S or more and 8S or less.

  When the length is less than 2S, the yarn separation from the separate roller is worsened, the yarn breakage increases, and the yarn threading success rate tends to decrease. If it exceeds 8S, the gripping force of the yarn is low, the followability of the separate roller is lowered, the yarn is abraded, the loss of yarn threading tension is increased, and the threading success rate is decreased.

  Further, when the surface of the separate roller is mirror-finished, it is preferable from the viewpoint that the thread separation can be improved by reducing the contact area as a groove. In the present invention, any one of these separate rollers can be used.

  Moreover, the above-mentioned grooved means that grooves are formed in a direction perpendicular to the traveling direction of the running yarn. Groove machining is based on the ratio of the convex part, that is, the length of the actual thread contact by grooving is 40% or less with respect to the length of the thread contact when the ring guide surface is not grooved. Is preferred.

  Moreover, it is preferable that the diameter D of a separate roller is 50 mm or less. By setting it to 50 mm or less, the initial driving load when the traveling yarn Y comes into contact with a separate roller (corresponding to 9 in the figure) is reduced, and yarn breakage can be prevented. Further, the followability can be improved, and the loss of the yarn hooking tension at the time of changing the direction of the yarn due to contact and abrasion can be reduced.

  On the contrary, if it exceeds 50 mm, the initial driving load becomes large. When the diameter D of the separate roller (corresponding to 9 in the figure) is smaller than 30 mm, the number of rotations driven and rotated in the running yarn direction increases due to contact with the yarn sucked by the suction device, and the processing accuracy is high. It is more preferable that the thickness is 30 to 50 mm because it is difficult to produce a material that can withstand rotation.

  For example, when the direction changing guide constituting the yarn hooking guide is a ring guide with a grooved surface, the ring guide with the grooved is point contacted by the thread contacting the ring guide. Therefore, the contact length with the running yarn Y is minimized, the abrasion resistance is reduced, and the tension loss due to abrasion can be reduced. In addition, the above-mentioned grooved means what gave a groove | channel to the orthogonal | vertical direction with respect to the advancing direction of a running yarn. In the groove processing in the present invention, the ratio of the convex portion, that is, the length in which the yarn actually contacts by the groove processing is 10 to the length in which the yarn contacts when the ring guide surface is not grooved. It is preferable that it is provided so as to be not more than% and the frictional resistance due to abrasion is reduced.

  The diameter of the ring guide is preferably 20 mm or less. By setting the diameter to 20 mm or less, the yarn contact length with which the traveling yarn contacts the convex portion of the ring guide (corresponding to 9 in the figure) is reduced, and further, the fretting is suppressed, leading to a reduction in yarn breakage. is there.

  The configuration and material of the yarn hooking guide using a winding machine that performs threading by guiding the yarn hooking guide to a spindle that rotates with a plurality of bobbins attached to the spinning machine as shown in FIGS. The yarn fineness was changed and the success rate of threading was evaluated.

About each characteristic value in an Example, it calculated | required in accordance with the following method.
(1) Yarn tension Tension using a tension meter (model number: MODEL TTM-101) manufactured by Toray Engineering Co., Ltd. did.
(2) Suction tension Using a tension meter (model number: MODEL TTM-101) manufactured by Toray Engineering Co., Ltd., measurement average of the tension (measured for 30 seconds) of the running yarn Y between the yarn path regulation guide 8 and the suction gun 11 Value.
(3) Threading tension variation Using the average value, the maximum value and the minimum value of the threading tension of each yarn measured for 30 seconds, it was calculated from the following formula.
Threading tension variation (%) = ((maximum value of threading tension−minimum value) / average value) × 100
(4) Yarning success rate In Examples 1 to 13 and Comparative Examples 1 to 4 shown in Table 1, when the yarn threading operation was performed 100 times, the ratio of the number of times of successful threading and the total number of times of yarn threading It was calculated by the following formula.
Threading success rate (%) = (Number of successful threading / 100 (times)) × 100
In the evaluation, a threading success rate of 90% or more was regarded as acceptable.

Examples 1 and 2
In the spinning machine shown in FIG. 1, a polyamide resin (nylon 6) having a 98% sulfuric acid relative viscosity of 2.63 and a titanium oxide content of 0.4 wt% is melt-spun at 265 ° C. as a thermoplastic fiber and cooled and solidified ( (Not shown), oil agent application (not shown), stretching between the stretching rollers 1 and 2, a polyamide running yarn Y that has undergone a heat treatment process with the stretching roller 2, and the yarn fineness is 11 dtex (implemented) Example 1), 26 dtex (Example 2), both of which were 10 filaments, 8 yarns, and a winding speed of 4500 m / min.

  At this time, the yarn fineness was changed by changing the supply amount of the polyamide resin. A separation roller (roller diameter: 40 mm) having a surface roughness of 4.0 S and a chrome coating on the surface contacting the traveling yarn was used as the direction changing guide constituting the yarn hooking guide.

  Further, the yarn hooking tension of the yarn was adjusted using a water suction gun as a suction device so that the suction pressure before the suction gun shown in FIG. 1 was 0.5 cN / dtex. Table 1 shows the results of variations in threading tension, suction tension, and threading tension.

  The bobbin used was a so-called paper tube made of paper and provided with slit grooves at the ends as thread gripping means. The slit groove has a configuration in which an introduction groove having a wide groove width and a gripping groove having a narrow groove width are linearly connected, and the groove shape is wavy. In addition, the time until the yarn shifts to the traverse state after the yarn is hooked on the yarn gripping portion is set to 0.2 seconds.

Example 3
Implemented except using a separate roller (roller diameter: 40 mm) with a chrome coating groove on the mirror surface with a surface roughness of 0.8S on the surface where the running yarn contacts the direction change guide that forms the yarn hook guide In the same manner as in Example 1, melt spinning and winding were performed. In the above-mentioned grooved processing, a groove was provided in the vertical direction of the running yarn, and the convex portion ratio of the surface directly in contact with the yarn was 40%. The yarn threading tension was set to the same pressure as in Example 1 using a water suction gun as a suction device. Table 1 shows the results of variations in threading tension, suction tension, and threading tension.

Example 4
Implemented except using a separate roller (roller diameter: 40 mm) with a chrome coating groove on the mirror surface with a surface roughness of 0.8S on the surface where the running yarn contacts the direction change guide that forms the yarn hook guide In the same manner as in Example 1, melt spinning and winding were performed. In the above-described grooved processing, a groove was provided in the vertical direction of the running yarn, and the convex portion ratio of the surface directly in contact with the yarn was 50%. The yarn threading tension was set to the same pressure as in Example 1 using a water suction gun as a suction device. Table 1 shows the results of variations in threading tension, suction tension, and threading tension.

Example 5
Same as Example 1 except that a separate roller (roller diameter: 40 mm) having a surface roughness of 1.2S applied to the surface where the traveling yarn contacts is used as the direction changing guide constituting the yarn hooking guide. The material was melt-spun and wound up. The yarn threading tension was set to the same pressure as in Example 1 using a water suction gun as a suction device. Table 1 shows the results of variations in threading tension, suction tension, and threading tension.

Example 6
Same as Example 1 except that a separate roller (roller diameter: 40 mm) having a surface roughness of 2.0S and a chrome coating textured surface is used for the direction change guide constituting the yarn hooking guide. And melt spun. The yarn threading tension was set to the same pressure as in Example 1 using a water suction gun as a suction device. Table 1 shows the results of variations in threading tension, suction tension, and threading tension.

Example 7
Same as Example 1, except that a separate roller (roller diameter: 40 mm) having a surface roughness of 8.0S applied to the surface where the traveling yarn contacts is used as the direction changing guide constituting the yarn hooking guide. The material was melt-spun and wound up. The yarn threading tension was set to the same pressure as in Example 1 using a water suction gun as a suction device. Table 1 shows the results of variations in threading tension, suction tension, and threading tension.

Example 8
Same as Example 1 except that a separate roller (roller diameter: 40 mm) having a surface roughness of 9.0 S applied to the direction where the traveling yarn contacts is used for the direction changing guide constituting the yarn hooking guide. The material was melt-spun and wound up. The yarn threading tension was set to the same pressure as in Example 1 using a water suction gun as a suction device. Table 1 shows the results of variations in threading tension, suction tension, and threading tension.

Example 9
Except for using a ring guide (ring diameter 15 mm) with a ceramic coating groove on the surface as a direction changing guide constituting the yarn hooking guide, melt spinning and winding were performed in the same manner as in Example 1. In the above-described grooved processing, a groove was provided in the vertical direction of the running yarn, and the ratio of the convex portion on the surface that directly contacted the yarn was 10%. The yarn threading tension was set to the same pressure as in Example 1 using a water suction gun as a suction device. Table 1 shows the results of variations in threading tension, suction tension, and threading tension.

Example 10
Except for using a ring guide (ring diameter 15 mm) with a ceramic coating groove on the surface as a direction changing guide constituting the yarn hooking guide, melt spinning and winding were performed in the same manner as in Example 1. In the above-described grooved processing, a groove was provided in the vertical direction of the running yarn, and the ratio of the convex portion of the surface directly in contact with the yarn was 15%. The yarn threading tension was set to the same pressure as in Example 1 using a water suction gun as a suction device. Table 1 shows the results of variations in threading tension, suction tension, and threading tension.

Example 11
A spinning machine as shown in FIGS. 1 and 2 was used, and melt spinning was carried out in the same manner as in Example 1 except that the number of yarns was 12 and the yarn threading tension and the yarn threading success rate were evaluated.

Example 12
The thermoplastic resin was melt-spun and wound in the same manner as in Example 1 except that a polyamide resin (nylon 66) with 98% sulfuric acid relative viscosity of 2.80 was melt-spun at 295 ° C. The success rate was evaluated.

Example 13
The thermoplastic resin was melt-spun and wound in the same manner as in Example 2 except that a polylactic acid resin (manufactured by Nature Works, grade 6201D) was melt-spun at a temperature of 220 ° C. and evaluated for threading tension and threading success rate. did.

Comparative Examples 1 and 2
Except that the direction changing guide constituting the yarn hooking guide was not attached, except for Example 1 (Comparative Example 1, yarn fineness of 11 dtex) and Example 2 (Comparative Example 2, yarn fineness of 26 dtex), In the same manner as in Example 1, melt spinning and winding were performed. Table 1 shows the results of variations in threading tension, suction tension, and threading tension.

Comparative Example 3
Except that the yarn fineness was 44 dtex, melt spinning and winding were performed in the same manner as in Example 1. Table 1 shows the results of variations in threading tension, suction tension, and threading tension.

Comparative Example 4
The yarn was melt-spun and wound in the same manner as in Example 1 except that the yarn fineness was 44 dtex and the direction changing guide constituting the yarn hooking guide was not attached. Table 1 shows the results of variations in threading tension, suction tension, and threading tension.

  As can be seen from the results in Table 1, when the yarn fineness exceeds 33 dtex regardless of whether or not the present invention is adopted in the configuration of the yarn hooking guide, as shown in Comparative Example 3, the present invention As shown in Comparative Example 4 in which the yarn threading device according to the present invention was used and the yarn threading device according to the present invention which did not use the yarn threading tension, although there was a difference in the value of the yarn threading tension, Both rates are 100% and good results are obtained.

  However, as shown in Comparative Example 1, the yarn fineness is 11 dtex, and as shown in Comparative Example 2, the yarn fineness is 26 dtex, and the yarn having a yarn fineness of 33 dtex or less is wound around a winder. At this time, if the yarn hooking device according to the present invention is not used, a tension loss occurs due to the effect that the yarn is rubbed with the yarn hooking guide, the yarn hooking tension is lowered, and the yarn hooking tension variation is also reduced. The threading success rate decreased significantly to 64% and 81%, respectively, due to the increase of 22 to 30%.

  When the present invention is adopted in the configuration of the yarn hooking guide, as shown in Examples 1 to 13, even when the yarn fineness is 33 dtex or less, the abrasion resistance generated between the yarn and the yarn path guide is reduced, By suppressing the tension loss, the decrease in the threading tension and the variation in the threading tension between the yarns are greatly reduced to 3 to 14% of the average tension value, and the threading success rate is 90% or more. This is a significant improvement over the case where the yarn threading device according to the present invention is not used. Among them, as shown in Examples 1, 2, 6, and 7, when using a separate roller having a diameter of 50 mm, which has been subjected to 2.0 to 8.0 S chrome plating finish on the direction changing guide constituting the yarn hooking guide. Further, the tension loss due to the thread rubbing was suppressed, and the success rate of threading was 95% or more, and further improvement was observed. Similarly, as shown in Example 3, when a separation roller having a grooved surface with a convex portion ratio of 40% or less is used for the direction changing guide constituting the yarn hooking guide, the yarn hooking success rate A further improvement of 95% was observed.

  In addition, as shown in Example 9, a ring guide (ring diameter: 15 mm) having a ceramic coating on the surface and a grooved processing with a convex portion ratio of 10% or less was used for the direction changing guide constituting the yarn hooking guide. In this case, a stable threading success rate of 95% could be obtained.

  Even when the number of yarns wound simultaneously on the winder is changed from 8 yarns to 12 yarns as shown in Example 11, when the present invention is adopted in the configuration of the yarn hooking guide, the yarn is stable at 98%. Multiplying success rate was obtained.

  Furthermore, even when the material of the yarn to be wound is nylon 66 and polylactic acid resin as shown in Examples 12 and 13, when the present invention is adopted in the configuration of the yarn hooking guide, 100% and 95%, respectively. A stable threading success rate was obtained.

  As described above, the present invention can remarkably improve the threading success rate when threading thermoplastic fibers having a fineness of 33 dtex or less.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view of a yarn threading device of a thermoplastic fiber winder as an example for carrying out the present invention. 1 is a schematic side view of a yarn threading device of a thermoplastic fiber winder as an example for carrying out the present invention. It is an upper surface schematic model figure of the yarn threading device of the winding machine of the thermoplastic fiber which is an example for implementing this invention. It is a front schematic model figure showing the operation state of the yarn hooking guide of the yarn hooking device of the thermoplastic fiber winding machine which is an example for carrying out the present invention. It is a schematic model figure of the grooved surface of the direction change guide (separate roller) of the threading device of the winding machine of the thermoplastic fiber which is an example for implementing this invention. It is a schematic model figure of the grooved surface of the direction change guide (ring guide) of the threading device of the winding machine of the thermoplastic fiber which is an example for implementing this invention.

Explanation of symbols

1, 2: Stretching roller 3: Yarn path guide 4: Swing fulcrum guide 5: Traverse guide 6: Roller bale 7: Spindle 8: Yarn path regulation guide 9: Direction change guide 10: Bobbin / winding yarn 11: Suction device (Suction gun)
12: Bobbin thread gripping groove Y: Traveling thread θ: Contact angle of traveling thread with respect to bobbin when threading

Claims (3)

  A yarn threading device for a winder that winds thermoplastic fibers having a yarn fineness of 33 dtex or less onto a bobbin rotating at a winding speed of 3500 m / min or more, and sucks a plurality of yarns simultaneously with a suction device. However, the thermoplastic fiber is characterized in that the yarn is guided to the thread gripping portion of the bobbin by the yarn hooking guide composed of the yarn path regulating guide and the direction changing guide provided immediately below the yarn guide. A threading device for a winder.   The tension variation between the yarns when threading the plurality of yarns while sucking the plurality of yarns with a suction device is 0 to 10% with respect to the average tension value. Threading device for winder of thermoplastic fiber.   The said direction change guide which comprises the said thread hook guide consists of a separate roller by which the surface has been satin-finished or grooved, or a ring guide by which the surface was grooved. Or a yarn threading device for a thermoplastic fiber winder according to 2;

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